Study of B → ψ(2S)K and B → ψ(2S)K ∗ (892) decays (CLEO Collaboration)

نویسندگان

  • S. J. Richichi
  • H. Severini
  • P. Skubic
  • A. Undrus
  • S. Chen
  • J. Fast
  • J. W. Hinson
  • J. Lee
  • D. H. Miller
  • E. I. Shibata
  • I. P. J. Shipsey
  • V. Pavlunin
  • D. Cronin-Hennessy
  • V. Savinov
  • X. Zhou
  • T. E. Coan
  • V. Fadeyev
  • Y. Maravin
  • I. Narsky
  • R. Stroynowski
  • J. Ye
  • T. Wlodek
  • M. Artuso
  • R. Ayad
  • C. Boulahouache
  • K. Bukin
  • E. Dambasuren
  • S. Karamov
  • G. Majumder
  • G. C. Moneti
  • R. Mountain
  • S. Schuh
  • T. Skwarnicki
  • A. H. Mahmood
  • S. E. Csorna
  • R. Godang
  • K. Kinoshita
  • I. C. Lai
  • S. Schrenk
  • G. Bonvicini
  • D. Cinabro
  • S. McGee
  • L. P. Perera
  • G. J. Zhou
  • E. Lipeles
  • S. P. Pappas
  • M. Schmidtler
  • A. Shapiro
  • W. M. Sun
  • A. J. Weinstein
  • F. Würthwein
  • D. E. Jaffe
  • G. Masek
  • H. P. Paar
  • E. M. Potter
  • S. Prell
  • V. Sharma
  • D. M. Asner
  • A. Eppich
  • T. S. Hill
  • R. J. Morrison
  • H. N. Nelson
  • R. A. Briere
  • G. P. Chen
  • B. H. Behrens
  • W. T. Ford
  • A. Gritsan
  • D. G. Cassel
  • G. E. Gladding
  • G. D. Gollin
چکیده

Color-suppressed decays of B mesons to final states with ψ(2S) mesons have been observed with the CLEO detector. The branching fractions for the decays B+ → ψ(2S)K+, B+ → ψ(2S)K∗(892)+, B0 → ψ(2S)K0, and B0 → ψ(2S)K∗(892)0 are measured to be (7.8±0.7±0.9)×10−4 , (9.2±1.9± 1.2)× 10−4, (5.0± 1.1± 0.6)× 10−4, and (7.6± 1.1± 1.0)× 10−4, respectively, where the first uncertainty is statistical and the second is systematic. The first measurement of the longitudinal polarization fraction is extracted from the angular analysis of the B → ψ(2S)K∗(892) candidates: ΓL/Γ = 0.45 ± 0.11 ± 0.04. Our measurements of the decays B0 → ψ(2S)K0 and B+ → ψ(2S)K∗(892)+ are first observations.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Study of Exclusive Nonleptonic Decays of B Mesons into Final States of Strange Mesons and 1s or 2s Charmonia

Bound states of heavy quarks can serve as a laboratory for inquiry into the behaviour of the fundamental strong and electroweak interactions. This thesis examines observations of B0, B0, and B± mesons produced in proton-antiproton collisions at centre-of-mass energies of √ s = 1.8 TeV. The B-meson decay products are recorded using the Collider Detector at Fermilab (CDF) located on the Tevatron ...

متن کامل

and measurements of B - meson branching fractions into J / ψ and ψ ( 2 S ) final states

We report the observations of the decays B+ → ψ(2S)K+ and B0 → ψ(2S)K∗(892)0 in pp̄ collisions at a center-of-mass energy of 1.8 TeV using a 110 pb−1 data sample recorded by the Collider Detector at Fermilab. We also reconstruct the decays B+ → J/ψK+ and B0 → J/ψK∗(892)0 and measure the six ratios of branching fractions of these four decays. The relative branching-fraction results are shown to b...

متن کامل

Recent Charmonium Physics from BES

Measurements of branching fractions for ψ(2S) decays into ωππ, b1π, ωf2(1270), ωKK, ωpp̄, φππ, φf0(980), φK K, and φpp̄ final states, based on a data sample of (4.02 ± 0.22) × 10 ψ(2S) events collected with the BESI detector at the Beijing ElectronPositron Collider, are reported. Using the same event sample, radiative decays of the radially excited charmonium resonance, ψ(2S), into ππ, KK and ηη ...

متن کامل

Search for CP violation in B ± → J / ψK ± and B ± → ψ ( 2 S ) K ±

We present a search for direct CP violation in B → J/ψ K and B → ψ(2S)K decays. In a sample of 9.7 × 106 BB meson pairs collected with the CLEO detector, we have fully reconstructed 534 B → J/ψK and 120 B → ψ(2S)K decays with very low background. We have measured the CP -violating charge asymmetry to be (+1.8 ± 4.3[stat] ± 0.4[syst])% for B → J/ψ K and (+2.0 ± 9.1[stat]± 1.0[syst])% for B → ψ(2...

متن کامل

ar X iv : h ep - e x / 04 07 03 7 v 2 2 9 M ar 2 00 5 Observation of the decay ψ ( 2 S ) → K ∗ ( 892 ) K

Using 14 million ψ(2S) events collected with the BESII detector, branching fractions of ψ(2S) → K(892)K+c.c. and K(892)K 0 + c.c. are determined to be: B(ψ(2S) → K(892)K + c.c.) = (2.9 −1.7 ± 0.4) × 10 −5 and B(ψ(2S) → K(892)K 0 + c.c.) = (13.3 −2.7 ± 1.7)× 10 . The results confirm the violation of the “12% rule” for these two decay channels. A large isospin violation between the charged and ne...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008